TITLE

Antiferromagnetism at the YBa2Cu3O7/La2/3Ca1/3MnO3 interface

AUTHOR(S)
Haberkorn, N.; Guimpel, J.; Sirena, M.; Steren, L.B.; Saldarriaga, W.; Baca, E.; Gómez, M.E.
PUB. DATE
May 2004
SOURCE
Applied Physics Letters;5/10/2004, Vol. 84 Issue 19, p3927
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetic properties of a series of YBa2Cu3O7-x/La2/3Caâ…“MnO3(YBCO/LCâ…“MO) superlattices grown by dc sputtering at high oxygen pressures (3.5 mbar) show the expected ferromagnetic behavior. However, field-cooled hysteresis loops at a low temperatures show the unexpected existence of exchange bias effect associated with the existence of ferromagnetic/ antiferromagnetic (AF) interfaces. The blocking temperature (TB) is found to be thickness dependent and the exchange bias field (HEB) is found to be inversely proportional to the ferromagnetic layer thickness, as expected. The presence of an AF material is probably associated with interface disorder and Mn valence shift toward Mn4+.
ACCESSION #
13029114

 

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